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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f60c612a12f516ae36af0de7ad52c77d9a326b099002d6f9858d34562095412f' 
  AND token = 'jI2PN2TOLaXT1d+YXOHrffAnwc5oiMzwvQsiqoFL0Go=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}